The Peerless ACC845 Anti-Vibration Ceiling Plate is designed to reduce vibrations on a mounting surface that could cause internal damage or cause interference with a projector image. It features 2 cord management access holes and a standard 1 1/2" 11.5 NP
Structural vibrations, typically caused by the buildings' heating / cooling system, can adversely effect the image projected by a ceiling mounted projector. Peerless Vibration Absorber Ceiling Plate features a patented interface which absorbs such vibrations to reduce image distortion. Peerless Vibration Absorber Ceiling Mount is one of many available through Office Depot. Made by Peerless-AV.